Fire-engine.



C. P. WATEROUS.

FIRE ENGINE.

APPLICATION FILED APR. 19. 1915.

1,283,853, Patented Sept. 4,1917.

2 SHEETS-SHEET I.

hurrah srarns rnrnnr opinion.

cirnnnns r. wn'rnaous, or snrAUL, MINNESOTA, ASSIGNOR 'ro wn'rnnous ENGINE WORKS COMPANY, or sr. PAUL, MINNESOTA, A oonronarroN or MINNESOTA.

FIRE-ENGINE.

Specification of Letters Patent. Patented Sept. 4t, 1191?.

Application filed April 19, 1916. Serial No. 92,265.

To all whom it may concern:

Be it known that I, CHARLES PrWA'rnn- OUS, citizen of the United States, resident of St. Paul, county of Ramsey, State of Minnesota, have invented certain new and useful Improvements in Fire-Engines, of which the following is a specification.

In the operation of an internal combustion engine used for driving the pump of a fire engine truck, difliculty has been experienced in keeping the water in the circulating system sufficiently cool when the engine-is laboring under a heavy load, as it usually is in operating a pump of this kind.

The object ofthe inventionis to provide means to prevent heating of the engine by circulating system during the operation of the pump.

A further object is to provide means for raising the temperature of this stream of water whenever desired before its introduc tion into the circulating system.

Other objects of the invention will appear from the following detailed description.

The invention consists generally in various constructions and combinations, all as hereinafter described and particularly pointed out in the claims.

In the accompanying drawings forming part of this specification,

Figure 1 is a plan view of a fire engine truck with my invention applied thereto,

Fig. 2 is a side elevation, partially in section, of the engine and pump.

In the drawing, 2 represents the frame of the truck, having forward carrying wheels 3 and a rear axle 4: and wheels 5 driven through belts 6 from the drive shaft mounted transversely in the frame within the housing 7 8 is the motive power, consisting of an internal combustion engine having any suitable number of cylinders mounted upon the frame of the truck. 9 is the radiator of the water circulating system, 10 a pump of any suitable type having a pipe connection 11 with the radiator and a pipe connection 12 with the circulating chambers inclosing the engine cylinders. A. re turn pipe 13 leads from the cylinders to the top of the radiator. An overflow pipe 14 is connected with the top of the radiator through which any surplus water may esend of driven cape from the system. At the rear the truck is a rotary pump 15 through a shaft 16 and supported on the frame of the machine and having a supply reservoir 17and pipe connections 18 for the fire hose. The engine of the fire truck will usually be operating under a heavy load and the water in thecirculating system will soon become heated and unless replaced with cool water might cause serious damage to the engine. I therefore connect the pump, preferably through one of the hose connections, by means of a, comparatively small pipe 19with the supply pipe 12, interposing a check valve 20 to prevent any return flow in thepipe 19 and also'a valve 21 by means of which the flow through the pipe can be entirely out off. When this valve 21 is open, a small supply of water will flow through the pipe 19 continuously to the supply pipe 12 and from thence pass through the circulating system to the radiator and overflow through the pipe 14.

During the summer months, the water thus delivered to the circulating system will be of the right temperature to keep the engine cylinders cool, but in the winter the ice cold water taken into the pump is of a lower temperature than is necessary and will tend to reduce the efficiency of the engine. I therefore provide means for jacketing the pipe 19 by means of a long sleeve 22 which has a branch connection 23 leading to the exhaust of the engine so that the hot gases from the exhaust will be discharged into the sleeve 22 and will flow lengthwise therethrough around the pipe 19, provision being made at 21 to permit the escape of this gas around and through the housing of the pump. The sleeve .22 is nearly the length of the fire truck and the gas flowing around in this sleeve and contacting with the walls of the pipe 19 will soon raise the temperature of the ice cold water received from the pump and by the time it reaches the supply pipe 12, it will be of suitable temperature to enter the circulating system and prevent the heating of the engine cylinders while not cold enough to reduce the efficiency of the engine.

I prefer to provide also a branch pipe 25 with a valve 26 mountedat the intersection of the pipes 23 and 25 and adapted to close either one of them, the pipe 25 discharging into the atmosphere and the adjustment of I .Gopies of this patent inay be obtained for a desired temperature in the circulating system suitable for keeping the engine cool during the different seasons and climatic changes.

In various ways the details of construction herein shown and described may be modified and still be within the scope :of my invention.

1 claim as my invention:

1. The combination, with an internal combustion engine having a water circulating system and an overflow therefor, of a pump having a driving connection with said engine, a comparatively small water supply pi pe leading from said pump to said circulating system for delivering continuously a supply oft cool water, thereto, a sleeve encircling said pipe and spaced therefrom and closed at one end and communicating at the other end with the jacket of said pump, a

Washington, D. 05

pipe leading from the engine exh'aust and communicating with said sleeve and having a branch pipetherein, and a valve mounted to direct the exhaust through said pipein'to said sleeve or divert it from said pipeinto said branch pipe.

2. A fire engine truck having an internal combustion engine mounted on the forward portion thereof and a water pump mounted on the rear portion of said truck, said engine having a water circulating system and overflow therefor, a comparatively small pipe leading from said pump to the supply pipe of said circulating, system for de livering cool water from said pump to said system, a sleeve encircling said pipe and spaced therefrom and having a pipe connection with the engine exhaust, and means forcontnolling the delivery of the exhaust to said sleeve.

my hand this It day of April 1916.

CHARLES r. Warn-nous.

five cents each, by addressing the (Commissioner otlfiatentfl I 

